Using your Marin San Quentin 2 hardtail mountain bike is a breeze. When riding, adjust your seat height to fit your comfort. For uphill rides, shift to lower gears to make pedaling easier. On downhill, use higher gears for speed and control. When you hit rough terrain, the bike's ISCG 05 tabs will keep the chain in place. Always wear a helmet and other safety gear. After each ride, give your bike a quick clean to remove dirt and debris. Check the brakes regularly to ensure they are working properly. Every few months, take it to a professional bike shop for a full tune - up. Keep the chain lubricated to prevent wear and tear, and store your bike in a dry place to avoid rusting.